MCL injury is also part of the  Unhappy Triad , or the common injury of the MCL, ACL, and Meniscus all together, usually through a pivot shift type of mechanism.The most obvious sypmtom of MCL injury is pain. Following the injury, you will experience pain in the knee, usually along the iside of the joint.CL injury is also part of the  Unhappy Triad , or the common injury of the MCL, ACL, and Meniscus all together, usually through a pivot shift type of mechanism.
With hemangiosarcoma, the pericardium fills up with blood due to rupture of the tumor. When the tumor occurs in the skin, a mass or lump can usually be felt in or under the skin. The mass may become ulcerated and bleed. When the tumor occurs in a bone, it can cause pain and discomfort.
1 Tumors. 2  Tumors in the thorax may erode a blood vessel or rupture and cause an acute bleed. 3  Tumors located on the pleural surface of the chest, blood vessels within the chest, lungs or heart may all cause a hemothorax. 4  The most common tumor to cause a bleed is hemangiosarcoma (a malignant tumor of blood vessels).